Date: Sat, 16 Oct 1999 10:43:08 +0100 (WEST) From: Joao Pagaime <jpsp@rccn.net> To: "Kenneth D. Merry" <ken@kdm.org> Cc: scsi@FreeBSD.ORG Subject: Re: FreeBSD 3.2 / Slow SCSI Dell PowerEdge 4300 - It works! Message-ID: <Pine.BSF.4.10.9910160959340.606-100000@atlas.rccn.net> In-Reply-To: <Pine.BSF.4.10.9910151111200.15842-100000@atlas.rccn.net>
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On Fri, 15 Oct 1999, Joao Pagaime wrote: > > On Thu, 14 Oct 1999, Kenneth D. Merry wrote: > > > Joao Pagaime wrote... <.....> > > And the kernel compiles, so I'll try it during the > weekend (It's a production machine) - I'll let you know. > Well, I did try the patch you sent. I also did a very simple naive test, that consisted in launching 10 processes concurrently. These processes simply wrote 100MB to the disk (one disk) The average time it took (3 runs & 10 procs) was 58.2 seconds without the patch (with write cache and no tag queueing - I think) With the patch (with write cache and tag queueing), it took 58.5 secs. I guess I'll keep the patch - the difference is negligible. I don't think these tests are representative any way, but I don't have the machine-time to make any further tests. In all cases it's one of the fastests computer on my operation center... Thanks again, Joao Pagaime PS: I have another Dell PowerEdge 4300 with Solaris for Intel that presents poor disk performance also - I guess that machine only works well out of the box with Dell's own drivers... To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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